Type-printing electric-telegraph system.



W. S. STELJES. TYPE PRINTING ELECTRIC TELEGRAPH SYSTEM.

APPLICATION FILED SEPT. 10, 1912.

1,152,059. Patented Aug. 31,1915.

4 SHEETS-SHEET 2.

Jim 4.

W/TA/ESSL'S: III/17701?! WALTERJJTELJES.

COLUMBIA PLANOGRAPH co., WASHINGTON. n. cy

w. s STELJES.

TYPE PRINTING ELECTRIC TELEGRAPH SYSTEM. APPLICATION FILED SEPT,10,l912.

4 SHEETS-SHEET 3.

\IOLUMBIA PLANDDIIAPH co..wAsmNa'r0N. n. t.

w. s. STELJES.

TYPE PRINTING ELECTR1C TELEGRAPH SYSTEM.

APPLICATION FILED SEPT. 10. 1912.

4 SHEETS-SHEET 4.

WITNESSES [NI/[N70191- W Y /M w ith? COLUMBIA PLANOCIRAPH 60.,WAsl-1INuTON. D. C.

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A R SAMU L T TE E 03 SOUTH Y'IFQT H M, LO D NGLA D- TYPE-PRINTING ELECTRIC-TELEGRAPH Specification of Letters Patent.

Patented A11 31, 1915.

Application fiiedse tember 10, 19. 2. Serial No. 719,635.

To all whom it may concern Be it known that I, lVAL'rER SAMUEL S'rELJns, a subject of the King of Great Britain, residing at South Tottenha n, in the county of London, England electrical engineer, have invented certain new and useful Improvements in and Relating to Type- Printi-ng Electric-Telegraph Systems, of which the following is a specification.

This invention relates to typographic tel-' tor for rotating the type wheel; Fig. 4 is a plan view of the same; Fig; 45 is an enlarged view showing the method of connecting the two parts of the type wheel shaft; Fig. 5 is a detail view of the mechanism for feeding the paper and Figs. 6 and 7, showa modified form of motor for rotating the type wheel, carrying a contact device for COD-r necting the printing circuit to a local source of supply; Fig. 8 being a plan view of a complete instrument.

In carrying this invention into, efiect as illustrated in Figs. 1 to 5 and 8, I provide a motor which is of the polarized double armature type described in British Patent No. 8891 of 1906 for rotating the type wheel synchronously with the signal impulses. The armatures or tongues (11 a which are pivoted at a are coupled together by a yoke 0 and each armature is adapted to compress a small spring cl at the end of its stroke so i that on the return stroke the recovery of the spring assists the electrical impulsesin mov- The type wheel operating shaft 0 is divided near the extremity at which the ratchet wheel 7? is situated! This ratchet wheel is acted on'so as to rotate the shaft by means of pawls 0 mounted on: the yoke 0 and reciprocated by themotor so asto cause rotation of the shaft, The "shaft ,6 is divided into two portions one of which is in the form of a sleeve 9 surrounding a stationary rod or pin 9 in the end; of which the other portion of the type Wheel-1 shaft 6 is. centered as shown in dotted lines in Fig;

4 The ratchet wheel 7 is rigidly secured to one end of the sleeve 9 while at the other end. a collar is formed on it having two projections, 9 clearly shown in Fig. 4:, between which a finger or projection h rigidly secured to the other portion of the shaft 6 projects, The outer extremity of this finger is not so wide as the distance between the projections 9 but is held against one of then-1 by means of a light spring h secured to the finger It. a By means of this connection the driving motor can start by deflecting the spring 72/ without first having to overcome the inertia of the type wheel shaft.- In this way the movement of the armatures of the motOl? can be 7 easily started so that only small power for operating the motor is necessary. The -type wheel is fixed upon a sleeve Z which is free to traverse long t dinallyl on the shaft 6 and- ,the type wheel carriage mwh'ich slides on a stationary shaft 42. has attached to it a cord which passes around a loose pulley atone end of the instrument and then completely around a spring drum 0 situated at the other end of the instrument and back to the type-wheel carriage. This I drum is fitted with two ratchet wheels 7) and (1, one of which, 7 is prevented from rotation in one direction by aratchet click r and the other ratchet wheel 9 is adaptedto be engagedby a feed" pawl 8 attached to the printing frameof the instrument. This printing frame consists of a paper-feed is fitted a spiral spring 2', one end of which is connected to the shaft and the other end to the barrel, On the shaft right hand side of instrument in Fig, 5 isfitted a ratchet wheel 3 with which a stationary spring-con:- trolled pawl 4 is adapted to engageso as to rotate the shaft and wind up the spring each time that the printing frame is actuated, The spring controlling the. feed click is so adjusted that the click automatically yields to prevent the barrel spring from,

being overwound, as, for example, by being ing rotation of the barrel in the opposite direction. At the other end of the barrel left hand Figs. 1 and 2 and on the axis of the barrel itself is fitted an escapement wheel 7 having a number of suitably spaced teeth adapted to engage with pallets on the fork 8 of a spring-biased reciprocating escapement lever 9 which is carried by and actuated by the printing frame.

As each letter is printed, the printing frame, by means of the pawl s which actuates the ratchet q, feeds the spring drum 0 one step forward thereby winding up the spring. The printing wheel carriage is connectedto the drum 0 by a cord whereby it traverses the type-wheel carriage along the paper, and when it is desired to return the carriage, as for example at the end of a line, the type-wheel shaft is rotated by the propelling escapement motor until a projecting pin 10 provided on the shaft 6 engages a projection 8 on the fork 8 of the escapement lever 9 of the paper feed roller. The escapement wheel 7 on the central shaft of the feed barrel is thereby released, allowing its spring to unwind and feed the paper forward through the space of a line. The escapement 1ever'9 is adapted, when projections 10 and 8" are in engagement, when moved by the printing magnet w to release the feed pawl s of the spring drum 0 (to which the type wheel carriage is connected) by means of a projection 9 carried by the lever engaging a projection 55 carried-by the pawl. The pawl s is also provided with an upward projection s which when the pawl is released from the wheel 9 engages a pin 1" on the click r so as to withdraw'the click from engagement with the ratchet wheel 1). When the pawl s and click 7" are thus withdrawn a lever 11 drops by gravity and holds both out of engagement with their respective ratchet wheels and the spring of the drum is free to return the type wheel carriage to its initial position at the beginning of a line. The type wheel carriage carries a rod Z'- which has a cam-shaped end adapted to raise the drop lever 11 and free the click 0" and pawl s so that they can return to their normal positions in engagement with the ratchet wheels 10 and g.

The motor for driving the type wheel'i controlled by a relay of the type described in the patent above referred to, so that its movements are synchronous with those of the relay and with the signals transmitted to the latter.

In applying my invention to a tape printing telegraph, the traversing movement of the type wheel is unnecessary, but otherwise themechanisms for. feeding the paper and printing the characters are constructed in a manner similar to those above described.

It has hitherto been proposed to actuate the printing frame and to drive the typewheel by the signaling current, but since the movement of the printing frame requires a arrangement has been found to be impracticable on account of the fact that it allows very few receiving instruments to be operated from the same circuit. To overcome this difiiculty it has been proposed to provide separate spring or weight driven motors for rotating the type wheel and for actuating the printing frame, the type wheel'being driven synchronously with the transmitting instrument by impulses of alternating polarity transmitted to the relay which actuates a suitable escapement, allowing the type wheel to rotate synchronously with the impulses, another magnet being used in series with the polarized relay which is responsive upon cessation of the impulses to release the escapement of the motor train which actuates the printing frame. As a modification of this arrangement it has also been proposed to substitute the spring driven train by an electromagnet which is brought into operation by the closure of an electric relay circuit by means of the printing magnet on cessation of the line current.

lVith the form of-relay illustrated in Figs. 6 and 7 the multiplicity of magnets in the line circuit is avoided, thereby increasing the speed of signaling and the interference with the proper operation of the machine by line leakage is prevented. The relay in these figures is provided with a contact closing armature, this contact closing armature being included in a local printing circuit which may be energized from an ordinary domestic source of supply or from a local battery or the like.

In Figs. 6 and 7, 12 represents the winding of the relay having a core 13 provided with pole-pieces 14c and 15, 15 are the polarized armatures which operate the type print ing wheel. 16, 1 6 are the permanent magnets. All the above parts may be constructed and operate substantially as described in the above patent. In addition, I provide a nonpolarized armature 17 pivoted at one end 1.

to one of the pole-pieces 1 1 and carrying at its other end a contact 18 adapted when the armature is attracted to the other pole-piece 14: to engage with a fixed contact 19 and so complete a local circuit including a battery or other-convenient source of current adapted to engage the electromagnet 110 corresponding to electromagnet w in Fig. 8 which operates the printing frame. The movement of the non-polarized ari'nature 17 may be limited by an adjustable insulated stop 111 or in any other convenient manner.

The operation is as follows:The alternating current impulses sent by the transmitter cause the relay and the type wheel I comparatively large amount of current this strument may be of any well known type.

In the case of a column printing telegraph, it is fitted with the usual attachments for feeding th ype h e gitudi ally along the paper for the printing of successive letters and also for feeding the paper across the axis of travel of the type wheel for the purpose of printing successive lines in the column. The additional armature 17 applied to the relay is, as stated, non-polarizedand during the operation of the polarized.

armatures, by alternate impulses transmitted along the line, the armature 17 is not attracted to the core of the electromagnet, the controlling spring of the armature being sufiiciently strong to overcome the magnetism of the core while these impulses are being sent; when, however, the transmitter is stopped at a letter, a prolonged current impulse is sent which sufliciently magnetizes the core to attract the armature and close the local printing circuit.

It is obvious that the relay might be adapted to operate on the cessation of the impulses by so constructing the magnetic core that it would normally attract the armature, holding the local circuit open, but on the cessation of the alternating impulses would release this armature so as to cause closure of the said circuit.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. In a receiving instrument for electric printing machines the combination of a type-wheel shaft, an electromagnetic motor having a reciprocating armature, a shaft, means for rotating said shaft actuated by the reciprocating armature and an elastic device interposed between the motor driven shaft and the type-wheel shaft, adapted to allow of the initial movement of the armature independently of the type wheel shaft and an inelastic device adapted to transmit the movement of the armature to the type wheel shaft after the initial movementhas taken place.

2. In a receiving instrument for electric printing machines, the combination with a roller for feeding the paper of a shaft situated inside said roller, a spring surrounding said shaft having one end secured to the shaft and the other to the roller, an electromagnet for moving said roller forward to print a letter on the paper and means for winding up said spring operated by the forward movement of the roller.

3. In a receivinginstrument for electric printing machines, the combination with'a type? wheel of a motor for: rotating said wheel, two. mechanically coupled armatures forming part of said motor, a magnet adapted: to attract said armatures alternately, springs adapted to be compressed by each of said armatures as it comes to rest in its position farthest from the magnet said springs assisting the electric energy when therarmature is again attracted.

I. In a receiving instrument: for electric printing machines the combination with a type-wheel, of a shaft. therefor divided: into two portions, a motor for rotating one of said portions, reciprocating armatures forming part of said: motor,'springsadapted to be compressed by each armature as it comes to rest and to assist the electric energy when the armature commences to move in the opposite direction, and a spring connection between the two portions of the shaft so arranged as to permit of the motor starting, before being required to transmit motion from one portion of the shaft to the other.

5. In a receiving instrument for electric printing machines, a type wheel adapted for rotary and axial movements and paper feed devices adapted to be oscillated into printing engagement with said wheel, in combination with a spring drum for giving axial movement to said wheel, ratchet and pawl devices for advancing the drum step by step and storing energy in the spring, pawl actuating mechanism mounted on the paper feed devices, a second pawl and ratchet mechanism to prevent backward movement of the drum, and means in response to preprinting machines, the combination with a type wheel of a motor for rotating said type-wheel, a polarized relay controlling said motor, a non-polarized armature on said relay, an electro-magnet controlled by said armature and a printing frame operated by said electro-magnet.

7. In a receiving instrument for electric printing machine, the combination of a driving and a driven shaft situated in alinement, a forked projection carried by one of said shafts and a crank carried by the other shaft, said crank projecting between the limbs of the forked projection and an elastic device also projecting between the limbs of the forked projection and adapted to be engaged by the forks before the crank is engaged thereby.

8. In a receiving instrument for electric printing machine, a shaft, a stationary cylindrical journal in alinement with said shaft, a pivotal bearing in the end of said journal in which the shaft is carried, a

sleeve rotatably mounted on said journal and an elastic connection between the sleeve and the shaft so that motion can be transmitted from one to the other.

9. In a receiving instrument for electric printing machines, a type'wheel in combination with paper feed devices comprising a roller, a shaft, a springconnection between said roller and shaft, electromagnetic mechanism for moving the roller forward to print a letter on the paper and for storing energy in said spring, and traversing means for said type wheel causing said spring to feed the paper forward at the end of the traverse.

10. In a receiving instrument for electric In witness whereof, I have hereunto set my hand this thirtieth day of August, 1912.

WALTER SAMUEL STELJ ES. Witnesses:

FREDK J. SKoYLEs, R. WESTACOTT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

